I think you must have a passport and separate eTA for the child if you intend to travel by air. The Canadian page says everyone needs an eTA and I believe that requires a passport. You do the latter by applying on behalf of your child. At least one airline says they will refuse boarding without both of those documents.

Also note that you must have a ticket for the child, even for babes in arms, for international flights. They may charge taxes for that- I recall being hit by that when I took my (then) infant son to the UK.

For what it's worth, I have never been questioned critically when traveling alone or as a couple with an infant or toddler. Probably possession of the child + the child's ID and travel documents (passport/eTA and birth certificate) is more than adequate.

By the way, make sure you have a ticket for the infant- it is required for international flights even when the babe-in-arms does not occupy his or her own seat. There may be some cost involved for that.

I think you must have a passport and separate ETA for the child if you intend to travel by air. You do the latter by applying on behalf of. At least one airline says they will refuse boarding without both of those documents.

Also note that you must have a ticket for the child, even for babes in arms, for international flights. They may charge taxes for that- I recall being hit by that when I took my (then) infant son to the UK.

I think you must have a passport and separate eTA for the child if you intend to travel by air. The Canadian page says everyone needs an eTA and I believe that requires a passport. You do the latter by applying on behalf of your child. At least one airline says they will refuse boarding without both of those documents.

Also note that you must have a ticket for the child, even for babes in arms, for international flights. They may charge taxes for that- I recall being hit by that when I took my (then) infant son to the UK.